body {
    background-color: rgb(235, 235, 235);
}
form {
    width: 400px;
    height: 320px;
    background-color: white;
    padding: 20px;
    box-sizing: border-box;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
h1 {
    margin-bottom: 20px;
    text-align: center;
}
form input {
    width: 100%;
    height: 30px;
    display: block;
    margin-bottom: 20px;
    padding-left: 10px;
    box-sizing: border-box;
}
.hhh {
    width: 100%;
    height: 30px;
    margin-bottom: 20x;
}
.hhh a:nth-child(1){
    float: left;
}
.hhh a:nth-child(2){
    float: right;
}
button {
    width: 100%;
    height: 40px;
    background-color: rgb(235, 235, 235);
    border: none;
}
button:active {
    box-shadow: 0 0 3px rgb(173, 172, 172);
}